and experienced a terrible cough as a side effect? My dog (7 lb pekingese mix) has been taking it for 2 days (100 mg 2x daily) and she had her third dose today. Since beginning this drug, she’s developed a terrible, nagging cough. She doesn’t seem to have any other side effects but it almost seems like she has a little trouble breathing at times (she begins to pant). I will call the vet in the morning and let them know that I’m going to discontinue this drug. Has anyone else experienced this?